Solution above is fine, but you can work on this after you reach level 10 (9 works but 10 is better) you will then be able to unlock SUPPLY DROP
and select the hellfire
weapon. After every battle use
and move out of it's way. Pick up the weapon and now your cooking with gasoline every battle. You can transfer points at any time.
If you go to the location in the solution above I suggest using the skill GHOST BREAK
before you burn them with
. This will help get you to 50 hacked enemies in the achievement mind control master. This is also a great place to get shield bash kills and possibly your 3 killed with 1 explosion.
While doing this you can mash the
to get some ruiner kills. I found every so often it would pop up quickly, but if I wasn't mashing the button I wouldn't be able to respond fast enough before they died.